PMC:7574920 / 24884-24906
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T177","span":{"begin":0,"end":22},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Neg Neg 2 637 639"}